Forced zipper merge

When a lane is closed for repaving or other roadwork, traffic is SUPPOSED to zipper merge, utilizing the closed lane's maximum allowable length before merging into the unclosed lane. The science is settled on this topic. When people do it right, it decreases congestion measurably. From what I've read on the topic, Germany and some other Europeans have got it down and successfully incorporated it into their driving culture.

We Americans... sigh... we're a stubborn, suspicious lot. We don't do the zipper merge right. Instead, at the first sign of an upcoming lane closure, we all feel a need to merge RIGHT FUCKING NOW and jam up the open lane for fucking MILES!

Well, here in Spokane, WA, USA (y'all can look it up if you want), just on the north side of the intersection of Monroe Street and Northwest Blvd, Monroe Street was recently renovated, and now merges from two lanes to one on the northbound side. There's no sign of the upcoming merge, it just... does. And traffic in both lanes manage to make it work when they reach the merge point unexpectedly. It works wonderfully, by simply not warning people about it.

So the idea is to use THAT idea ^ for temporary lane closures, but to take it a step even further. Instead of putting up a big flashing LED sign saying "right lane ends ahead", don't put up any signs whatsoever, and start separating the lanes with temporary concrete divider walls with a "Y" shaped set of arrows directing traffic to simply flow around the divider into both lanes. Then at the end of the divider wall, leave open just big enough a space for cars to safely merge into the open lane.

They'll figure it out. Or not.